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P�rfSSURE U+E G. Air leak through valve seal rings—Usually caused by <br /> worn or damaged seal rings or loose fittings. Tighten fit- <br /> iH7ecTior♦ point tings by hand until they are very snug. It there Is no im- <br /> provement, replace both seal rings In pump head. See <br /> enclosed Llquld Handling Assembly sheet. <br /> D. Ruptured pumping diaphragm—If rupture Is severe, <br /> and pump iA injecting into pressure, chemical leak will be = <br /> EMI MVIRiN6 PUMP obvious through the 3116" (5 mm)diameter hole at the bot- — <br /> toin of the spacer directly behind the pump head Replace <br /> pumping LiqulframTM(diaphragm), <br /> If rupture is a small pin hole, there may be oozing of solu- <br /> tion through the 3116" (5 mm) diameter hole described <br /> above. Repiacarnont of pumping LlqulframTM (diaphragm) — <br /> wilt be necessary. <br /> C500mi MINIMUM MssEL E. Clogged Liquid End—will cause low pump output. <br /> Disassemble Liquid End. Clean individual parts with water <br /> ".,I, ern and detergenf of appropriate aleaning seiulian. — <br /> (M/ tiTOPwATCH — <br /> F, Injection Into excessive pressure—If dlurzharl4e <br /> pressure is within 25 pal" of maximum pump rating, <br /> CALIBRATION TEST remove spring In injection check valve, if so supplied. — <br /> *10 psi on DE3, DE4, D43, D44, D73 & D74 Series. — <br />